作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 动态规划 暴力搜索+剪枝 线性遍历 日期 题目地址:https://leetcode.com/problems/number-of-subarrays-with-bounded-maximum/description/ 题目描述 We are given an array A of positive integers, and two positiv…

问题链接 LeetCode 795 题目解析 给定一个数组A,左右范围L.R.求子数组的数量,要求:子数组最大值在L.R之间. 解题思路 子数组必须连续,利用最大值R对数组进行分段,设定变量 left 记录每段开始位置(\(A[left] > R\),\(A[left+1] ≤ R\)),初始值为-1. 遍历数组,通过A[i]大小判断: 若 A[i] 在L.R之间,则 ans+=(i-j): 若 A[i] 大于R,则更改左界 left=i: 关键在于处理小于L的情况,由于需要子数组的最大值在L.…

数学的方式 是对于所有的字符分成简单的三类 0 小于 L 1 LR 之间 2 大于R 也就是再求 不包含 2 但是包含1 的子数组个数 不包含2的子数组个数好求 对于连续的相邻的n个 非2类数 就有 n*(n-1)//2 + n 个连续子数组 但是包含1 的子数组个数不好求,这里求反 求不包含 包含1 不包含2 的 子数组个数 原理同上 (将1 类这时视为2类) 最后做差即可 dp A[i] 为以 i 结尾的满足条件的子数组个数 A[i] =A[i-1] 当A[i] 是第1类数 A[i] =pr…

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least L and at most R. Example :…

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least Land at most R. Example : I…

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least L and at most R. Example :…

题目要求 We are to write the letters of a given string S, from left to right into lines. Each line has maximum width 100 units, and if writing a letter would cause the width of the line to exceed 100 units, it is written on the next line. We are given an…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 双指针 日期 [LeetCode] https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Total Accepted: 129010 Total Submissions: 384622 Difficulty: Easy 题目描述 Given a sorted array…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 迭代 日期 题目地址:https://leetcode.com/problems/delete-node-in-a-bst/description/ 题目描述 Given a root node reference of a BST and a key, delete the node with the given key in the BST. Re…

[LeetCode]452. Minimum Number of Arrows to Burst Balloons 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/description/ 题目描述: There are a number of spherical balloons spread in two-dimensio…